Separable fastener



Nov. 6, 1928.

F. S. CARRY SEPARABLE FASTENER @riginal Filed April 15. 1926 Inv/vena?lq'fed 4S". (Graw1 21 Patented Nov. 6, 1928.-

UNITED STATES PATENT OFFICE.

FRED S. CARR, OF NEWTON, MASSACHSETTS, ASSIGNOR T CARR FASTENER COH-PANY, OF CAMBRIDGE, MASSACHUSIEFFJPS, A CORPORATION OF MAINE.

SEPABABLE FASTENER.

Application filed April 15, 1929, Serial This invention aims -to provideimprovements in separable fasteners.

In the drawings, which illustrate a preferred embodiment of my inventionFigure 1 is a plan view of a corner of a carpet showing a plurality ofdotted circles to represent the position of the underlying fastener;

Fig. 2 is a section on the line 2-2 of Fig.

l@ 1, the stud being shown in elevation;

Fig. 3 includes an under side and a plan view respectively of the socketbefore attachment to a support; and

Fig. 4 is an enlarged sectional view taken M on the line H of Fig. 3.

Referring to the drawings, I have illustrated a fastener particularly,though not exclusively, useful for securing carpets and the like tofloors of motor vehicles and the like y 'Ihe socket illustrated ispressed from a single piece of metal to form an annulus having an outerflange or wall 1 extending as an inbent extension for an inner flange orwall 2 curved to provide a smooth rounded surface surrounding astud-receiving aperture 3. The outer and inner walls 1 and 2 areconnected at the bottom of the annulus by the web 4, as shown in Fig. 4.The annulus is severed by a plurality of slits 5 .extending entirelythrough the wall 2 and web 4 and terminating in the outer wall 1toprovide resiliency to the inner wall 2 so that it may expand andcontract slightly when being engaged with or disengaged from the stud 6.

The annulus is preferably secured to the carpet 7 by a plurality ofprongs 8 arising from the outer wall 1. These prongs 8 pierce the carpetfrom the under side and pass through the warp and weft threads whencethey are bent outwardly and downwardly by a setting die (not shown).

l/Vhen the socket is secured to the carpet 7 the prongs 8 are concealedby the pile or nap of the carpet. When the carpet is pulled upwardly toseparate the socket from the stud, the warp and weft threads pulltightly into the hooks provided by the outwardly bent prongs, as shownin Fig. 2.

Instead of disposing of the material between the prongs 6, I have formedtherefrom a plurality of ears 9, which are preferably bent inwardly fromthe upper edge of the wall 1, over the annulus in a plane some- No.102,348. Renewed Augustk14, 1928.

what above the plane of the upper edge of the resilient wall 2. Thusthese ears 9 rest directly against the under side of the carpet andprovide relatively wide smooth surfaces between the prongs to preventcutting of the carpet. They also protect the stud-engaging portionsdurin expansion and contraction from any possibility of interferencekfrom the warp and weft threads of the carpet. These ears positivelyprevent the carpet from wedging between the walls 1 and 2 andinterfering with the operation of the socket..

Itshould be noted that the prongs are located between the slits and aretherefore back-supported during the setting operation by a substantiallyrigid portion of theannulus.

The ears 9 are located at the slits 5 and therefore strengthen the outerwall 1 adjacent the ends of the slits to prevent them from breakingthrough the wall during contraction and expansion of the inner wall 2.

The stud member 6 may be of any suitable construction, depending uponwhether the floor 10 is of wood, metal or other material. However, thestud shown is of substantially the same construction as more fullydescribed in my co-pending application, Serial No. 81,862, filed January16, 1926.

While I have shown and described one embodiment of my invention, itshould be understood that I have done so merely for purposes ofillustration, my invention being more fully set forth in the followingclaims.

I claim:

1. A fastener socket having a peripheral wall, a pluralityof attachingprongs extending upwardly from said wall to secure said socket to asocket-carrying support, a studengagingportion extending inwardly andupwardly from the lower edge of said wall to provide a stud-engagingportion surrounding a stud-receiving aperture, said stud-engagingportion severed by a plurality'of slits to permit expansion andcontraction thereof 100 and a plurality of ears extending inwardly fromthe upper edge of the peripheral wall to provide a surface above theplane of the stud-engaging portion for engagement with the support toprevent interference between 105 the support and the stud-engagingportion during expansion and contraction thereof.

2. A fastener socket having a peripheral wall, a plurality of attachingprongs extending upwardly from said wall to secure said 310 socket to asocket-carrying support, a studengaging portion extending inwardly andupwardl from the lower edge of said wall to provi e a stud-engagingportion surrounding a stud-receiving aperture, said'stud-engagingportion severed by a plurality of slits to permit expansion andcontraction thereof, and means presented between the prongs for directcontact with one side of the socket support', said means being ofsubstantial width and extending toward the expansible and contractible'stud-engaging portion of the socket.-

3. A one-piece fastener socket comprising a peripheral wall continuingas an inbent extension, said inbent extension being severed by slitsextending into said peripheral wall, a pluralit .of ears integral withthe 'upper edge of t e peripheral wall and extending transverse to theaxis of the socket in a plane above the plane of the upper edge of theininward] from said outer flange above thel web an inner flange, said'ears formed from the material cut out between said prongs.

5. A fastener socket coin risin an annulus seated directly a ain'st t eun er side `of av socketcarrying fa ric, and

resenting a stud-engaging portion surroun' ing a studreceiving aperture,a pluralit of attaching prongs arising from saidannu us and hooked `intoengagement with the warp and weft threads of. the fabric, and aplurality of fabupper edge of the annulus.

f ric-en a ino' rtions bent inwardl from the g mp0 y outer e ge' of theannulus and extending vtransverse. to the' axis lof the socket at the y6.' A one-piece fastener socket having an upstanding wall continuing asan inbent extension, said inbent extension surrounding a stud-receivingaperture to engage the neckof 1a stud and a "plurality of inwardlyextending ears integral with the upper edge of the peripheral wall, saidears extending sub stantially transverse to the axis of the socket forengagement against that face of a carrying medium against which thesocket is to be secured to keep the carryin medium from interfering withthe action o the inbent extension and means integral with the socket forsecuring it to a support.

7 A fastener socket comprising an annulus of channel section adapted toseat directly against the under side of a socket-carrying fabric andpresenting a stud-engaging portion surrounding a stud-receivingaperture, said stud-engaging portion being divided by a plurality ofslits to provide a plurality of exible stud-engaging jaws, a pluralityof attaching prongs arising from said annulus at points opposite thesaid jaws, said prongs being adapted to hook into engagement with thewarp and weft threads of the fabric.

8. A fastener socket having means surrounding a stud-receiving aperturefor engagement with a cooperating stud, an upstanding wall surroundingsaid yieldable means, a plurality of attaching prongs extending upwardlyfrom the socket and a nuinbei' of support-engaging ears extendinginwardly from the upper edge of said wall between said rongs to providerelatively wide smooth sur aces for engagement against one face of asupport to preventl cutting thereof.

9. -A fastener socket installation including an annulus `seated directlyagainst the under side of a socket-carrying medium and rounding astud-receiving aperture and an u standing peripheral wa l surroundingsaid yieldable' having yieldable stud-engaging means suryieldablestud-engaging means, a plurality of attaching ron arising from saidannular wall an lioo ed into engagement with' the carrying medium and aplurality of carrying me iu'm engaofing ears bent inwardly from th freeedge of the annular wall, said ears being located between the attachingprongs and extending substantially transverse to the? axis of the socketat the upper ledge ofthe annulus to prevent cutting of the carryingmedium.

In testimony whereof, I have signed my name to this specification.

FRED s. CARR

